CN102389810A - Formaldehyde oxidation catalyst - Google Patents
Formaldehyde oxidation catalyst Download PDFInfo
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- CN102389810A CN102389810A CN2011103003309A CN201110300330A CN102389810A CN 102389810 A CN102389810 A CN 102389810A CN 2011103003309 A CN2011103003309 A CN 2011103003309A CN 201110300330 A CN201110300330 A CN 201110300330A CN 102389810 A CN102389810 A CN 102389810A
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Abstract
The invention provides a formaldehyde oxidation catalyst. The formaldehyde oxidation catalyst comprises the components in percentage by weight shown in the specification. In experiment, a novel formaldehyde removal catalyst is placed in filter gauze of a wall hanging type air conditioner, the catalyst can effectively decompose formaldehyde in air, and the formaldehyde removal rate reaches 93.7% after the air conditioner operates for 5 hours.
Description
Technical field
The present invention relates to a kind of catalyst, particularly, the present invention relates to a kind of oxidation catalyst of formaldehyde.
Background technology
The raising of Along with people's material and cultural life, interior decoration have become fashion, but room air pollution is also more and more serious.Formaldehyde is one of pollutant the most typical, the most serious in the indoor environment.The concentration limit of the formaldehyde in indoor air pollutant of China's national Specification is 0.08mg/m
3At present, the situation that concentration of formaldehyde exceeds standard in China's indoor environment is very serious, and investigation is found according to the sampling Detection of national Center for Disease Control, and the new finishing residential building concentration of formaldehyde of China more than 60% exceeds standard and caused great harm to people are healthy.Along with the raising of environmental consciousness, people pollute more indoor formaldehyde and pay close attention to, and also are to appear in the newspapers repeatly because of the indoor formaldehyde concentration complaint case that causes that exceeds standard in recent years.Therefore, research purifying formaldehyde technology comes effective elimination indoor formaldehyde to pollute has become the urgent task that improves people's living environment.
Mostly existing market is more common is that active carbon etc. produces the mode that electron ion is removed formaldehyde through absorption or energising; These two kinds of method utilizations be that indoor formaldehyde is adsorbed on the surface of removing the formaldehyde material; Perhaps adopt electron ion to remove formaldehyde; First kind of mode used the back for a long time because adsorbent adsorbs formaldehyde for a long time; And can't formaldehyde be decomposed, the formaldehyde ability of going that causes removing the adsorbate of formaldehyde progressively reduces last disappearance, if long-term use the back not changing can't to recur to remove the effect of formaldehyde.The second way is used the extra a large amount of electric energy of consumption of meeting for a long time, brings unnecessary consumption to the user.
Photocatalysis Decomposition pollutant technology is the many indoor air purification technology of current research; Obtained good indoor air purification effect; As obtained nano solid supper corrosive acid photochemical catalyst of national inventing patent (patent ZL98115808.0) etc., but this type catalyst is mainly with TiO
2Nano-powder or film are as photochemical catalyst, and method for preparing raw material is complicated, and specification requirement is high, and nano-photocatalyst needs specific excitation source.Non-photocatalysis oxidation technique is applied to purifying industrial organic waste gas usually because operating temperature is higher.In recent years, this technology is also having new progress and breakthrough aspect the indoor air purification research, as patent CN200410047973.7 just reported can the complete decomposing formaldehyde of non-at ambient temperature photocatalysis catalysis material.
Patent CN200410047973.7 discloses a kind of catalyst of the gas of oxidation of formaldehyde at ambient temperature; This catalyst is carrier with the metal oxide; Other noble metal of load 0.5～1%; Wherein metal oxide can be at least a in alundum (Al, nickel oxide, manganese dioxide, silica, the di-iron trioxide, and noble metal component can platinum, at least a in the gold, germanium, palladium.
Because the noble metal resource scarcity costs an arm and a leg, people are are also constantly researching and developing non-precious metal catalyst or low content of noble metal catalyst.
Summary of the invention
In order to solve the high problem of noble metal catalyst cost of the prior art, it is low to the invention provides a kind of noble metal component content, can be the catalyst of carbon dioxide and water with oxidation of formaldehyde.
According to an aspect of the present invention, a kind of oxidation catalyst of formaldehyde is provided, said by weight percentage catalyst comprises following component:
In above-mentioned catalyst, the percentage by weight of alundum (Al is preferably 32%～38%, is preferably 34%～36% especially, most preferably is 35.5%.
In above-mentioned catalyst, magnesian percentage by weight is preferably 11%～17%, is preferably 13%～15% especially, most preferably is 14%.
In above-mentioned catalyst, the percentage by weight of di-iron trioxide is preferably 0.4%～0.8%, most preferably is 0.7%.
In above-mentioned catalyst, the percentage by weight of silica is 46%～52%, is preferably 48%～50% especially, most preferably is 49.5%.
In above-mentioned catalyst, the percentage by weight of platinum is 0.25%～0.35%, most preferably is 0.3%.
Catalyst of the present invention adopts conventional immersion process for preparing.Selected inorganic oxide carrier impregnated in the soluble compounds aqueous solution of noble metal component; Stirred 1～5 hour, 80～120 ℃ of dryings, under air or nitrogen or hydrogen condition; In 200～7000 ℃ of roasting 1～8h of Muffle furnace, promptly get catalyst of the present invention.
Compared with prior art; Noble metal component in the oxidation catalyst provided by the invention is a platinum; Its percentage by weight is 0.2%～0.4%; And the noble metal component percentage by weight of oxidation catalyst of the prior art is 0.5～1%, and compared with prior art, oxidation catalyst cost provided by the invention is lower.And oxidation catalyst provided by the invention can be carbon dioxide and water with oxidation of formaldehyde efficiently; For example; When being placed on oxidation catalyst provided by the invention in the air conditioner filter screen, after the operation of air conditioner several hrs, indoor formaldehyde clearance is reached more than 90%.
In addition; The present invention also has the following advantages: 1) utilize the heat in the room air can activate the oxidation of formaldehyde reaction; The electron ion technology then needs the electric energy of consumes considerable, and the absorption through PARA FORMALDEHYDE PRILLS(91,95) removes the formaldehyde technology then need regularly replace the chemical reagent that is used to lock formaldehyde; 2) formaldehyde catalyst that removes of the present invention can not have any secondary pollution deposits yields with formaldehyde exhaustive oxidation Cheng Shui and carbon dioxide; 3) formaldehyde promptly is oxidized to water and carbon dioxide once absorption, the absorption saturation problem that does not have materials such as activated carbon, molecular sieve to exist, and used catalysis material stable performance, the following life-span of appropraite condition can reach the several years; 4) formaldehyde pollutes the back air and can reach efficient purification through catalyst material of the present invention, as plain filter, need not extra means, and is easy to use.
Description of drawings
Fig. 1 is that what to illustrate is that the concentration of formaldehyde is to time plot.
The specific embodiment
To describe the specific embodiment of the present invention in detail below, this only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Embodiment 1 Preparation of catalysts method
Getting 7.1 gram alundum (Al powder, 2.8 gram magnesium oxide powders, 0.14 gram ferric oxide powder and 9.9 gram SiO 2 powders impregnated in the certain density platinum chloride aqueous solution; Stirred 2 hours; After 100 ℃ of dryings; Under air conditions,, promptly obtain catalyst in 500 ℃ of roasting 2h of Muffle furnace.In the catalyst of processing, the platinum component is 0.3% by metal element wt conversion load capacity.
Embodiment 2 formaldehyde are removed efficiency test
The catalyst of embodiment 1 preparation is placed on the filter screen of wall-hanging air conditioner and experimentizes, in 5 hours of operation of air conditioner, test the concentration of formaldehyde value in the room at set intervals, test result such as table 1 are with shown in Figure 1.
The removal efficient of table 1 catalyst PARA FORMALDEHYDE PRILLS(91,95)
| Time (min) | Concentration (ppm) | Efficient (%) |
| 0 | 0.91 | 0.0％ |
| 5 | 0.84 | 8.2％ |
| 10 | 0.77 | 15.2％ |
| 20 | 0.69 | 24.0％ |
| 30 | 0.60 | 34.1％ |
| 40 | 0.53 | 41.2％ |
| 60 | 0.42 | 53.6％ |
| 120 | 0.22 | 76.0％ |
| 180 | 0.15 | 83.8％ |
| 240 | 0.09 | 90.0％ |
| 300 | 0.06 | 93.7％ |
Can find out by table 1, remove efficient through the formaldehyde of catalyst in 5 hours of embodiment 1 preparation and reach 93.7%.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited accompanying claims and equivalent thereof.
Claims (10)
1. the oxidation catalyst of a formaldehyde, said by weight percentage catalyst comprises following component:
2. oxidation catalyst according to claim 1, wherein the percentage by weight of alundum (Al is 32%～38%.
3. oxidation catalyst according to claim 1, wherein the percentage by weight of alundum (Al is 34%～36%.
4. oxidation catalyst according to claim 1, wherein magnesian percentage by weight is 11%～17%.
5. oxidation catalyst according to claim 1, wherein magnesian percentage by weight is 13%～15%.
6. oxidation catalyst according to claim 1, wherein the percentage by weight of di-iron trioxide is 0.4%～0.8%.
7. oxidation catalyst according to claim 1, wherein the percentage by weight of silica is 46%～52%.
8. oxidation catalyst according to claim 1, wherein the percentage by weight of silica is 48%～50%.
9. oxidation catalyst according to claim 1, wherein the percentage by weight of platinum is 0.25%～0.35%.
10. oxidation catalyst according to claim 1, wherein the percentage by weight of each component is respectively:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103003309A CN102389810A (en) | 2011-09-28 | 2011-09-28 | Formaldehyde oxidation catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103003309A CN102389810A (en) | 2011-09-28 | 2011-09-28 | Formaldehyde oxidation catalyst |
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| CN102389810A true CN102389810A (en) | 2012-03-28 |
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| CN2011103003309A Pending CN102389810A (en) | 2011-09-28 | 2011-09-28 | Formaldehyde oxidation catalyst |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941406A (en) * | 2015-05-25 | 2015-09-30 | 上海赛菲环境科技有限公司 | Efficient targeted filling material of formaldehyde removal filter screen |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040030214A1 (en) * | 2000-09-26 | 2004-02-12 | Goetz-Peter Schindler | Method for the dehydrogenation of hydrocarbons |
| CN1552456A (en) * | 2003-06-02 | 2004-12-08 | 中国科学院生态环境研究中心 | Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature |
| CN1795970A (en) * | 2004-12-28 | 2006-07-05 | 中国科学院生态环境研究中心 | High performance catalyst for catalyzing formaldehyde to complete oxidation under room temperature temperature |
| CN101380574A (en) * | 2007-09-06 | 2009-03-11 | 中国科学院生态环境研究中心 | Catalyst for complete oxidation of formaldehyde at room temperature |
-
2011
- 2011-09-28 CN CN2011103003309A patent/CN102389810A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040030214A1 (en) * | 2000-09-26 | 2004-02-12 | Goetz-Peter Schindler | Method for the dehydrogenation of hydrocarbons |
| CN1552456A (en) * | 2003-06-02 | 2004-12-08 | 中国科学院生态环境研究中心 | Oxidative catalyst and sterilizing method for catalyzing oxygen sterilization in air and purifying indoor air under room temperature |
| CN1795970A (en) * | 2004-12-28 | 2006-07-05 | 中国科学院生态环境研究中心 | High performance catalyst for catalyzing formaldehyde to complete oxidation under room temperature temperature |
| CN101380574A (en) * | 2007-09-06 | 2009-03-11 | 中国科学院生态环境研究中心 | Catalyst for complete oxidation of formaldehyde at room temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941406A (en) * | 2015-05-25 | 2015-09-30 | 上海赛菲环境科技有限公司 | Efficient targeted filling material of formaldehyde removal filter screen |
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Application publication date: 20120328 |